Finding the Fourth Proportional to 12,381.67, 17,086.56 and 6,716.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,381.67 : 17,086.56 = 6,716.31 : x
2. Step 2: Convert to fraction form
   12,381.67/17,086.56 = 6,716.31/x
3. Step 3: Cross multiply
   12,381.67x = 17,086.56 × 6,716.31
4. Step 4: Simplify right side
   12,381.67x = 114,758,633.79
5. Step 5: Solve for x
   x = 114,758,633.79/12,381.67
6. Step 6: Final answer
   x = 9,268.43